The super-shoe that made a sub two hour marathon possible

They said it couldn’t be done. On Sunday not one but TWO runners completed the London marathon in under two hours. It's a feat of human endurance for sure, but what they were wearing on their feet also played a starring role. Australian and world champion marathon runner Robert De Castella reflects on far the technology has come.The Doomsday Clock is closer to midnight than it's ever been with decades old nuclear disarmament treaties under pressure and world powers choosing force over diplomacy to get their way. Australian nuclear weapons expert Dr Emma Belcher says the world is on the verge of a new nuclear arms race .Actor Lisa McCune, talks about her latest project, a stage revival of the Hollywood classic, Steel Magnolias.